Terms of Service

1. Acceptance of these terms

By installing or using Lumen AI, you agree to these Terms of Service. If you do not agree, uninstall the extension. These terms apply to the browser sidebar extension distributed through the official Chrome Web Store and Microsoft Edge Add-ons store.

2. What Lumen AI is

Lumen AI is a browser sidebar extension for Google Chrome and Microsoft Edge. It is not a standalone desktop program and no software installer is downloaded from this website. Clicking a download button takes you to an official extension store, where installation happens under that store's terms. The extension provides tools such as asking about selected text, translation, page summarization, local notes and image text extraction.

3. No account and no subscription

The extension is free to install and use. There is no sign-up, no account, no login, no subscription fee and no ads.

4. Your API key and AI providers

Most features require you to supply your own API key from an AI service provider you choose. You are responsible for obtaining that key, keeping it confidential, complying with the provider's terms, and paying any fees that the provider charges.

Lumen AI does not provide AI services itself, does not resell API access and is not affiliated with any AI provider. Model availability, output quality and pricing depend entirely on the provider and key you configure. AI output can be inaccurate; please verify important information before relying on it.

5. Promotional free trial credits

New installs may include an optional promotional offer of free trial credits for selected AI models. The credit amount, validity period, eligibility, supported regions, and the identity of any service involved in providing the credits are shown inside the extension before activation.

Credits are optional, have no cash value, are not transferable and may be changed or withdrawn where permitted by law. Once credits are used up, or if you do not activate the offer, the extension continues to work with your own API key. The extension itself remains free.

6. Acceptable use

Use the extension only for lawful purposes. You must not use it to infringe intellectual property rights, to process material you have no right to process, to harass or harm others, to attempt to gain unauthorised access to any system, or in any way that violates the terms of the AI provider you selected. You are responsible for the content you choose to send to a provider.

7. Your content and intellectual property

You keep all rights to the text, notes and images you create or use. Lumen AI claims no ownership of your content or of AI output. The extension software, its name and its visual design remain the property of its publisher; these terms grant you a limited, non-exclusive right to use the extension, not ownership of it.

8. Disclaimer of warranties

The extension is provided "as is" and "as available", without warranties of any kind, express or implied. We do not warrant that it will be uninterrupted, error-free, or compatible with every website, browser version or AI provider. AI-generated summaries, translations and answers are produced by third-party models and may be incomplete or wrong.

9. Limitation of liability

To the maximum extent permitted by applicable law, the publisher of Lumen AI is not liable for indirect, incidental or consequential damages, loss of data, lost profits, or fees charged to you by a third-party AI provider, arising from the use of or inability to use the extension. Nothing in these terms limits liability that cannot lawfully be limited.

10. Termination

You may stop using the extension at any time by uninstalling it from your browser. These terms then cease to apply to your future use. Sections concerning your content, disclaimers and limitation of liability survive termination.

11. Changes to these terms

We may revise these terms as the extension changes. The current version is always published on this page with its effective date at the top. Continued use after a revision means you accept the updated terms.

12. Contact us

Questions about these terms can be sent to the address below.